An insole is a cushioned layer placed inside a shoe to provide comfort and support for the foot. It helps absorb shock, reduce pressure on the feet, and can improve overall posture. Insoles come in various materials, such as foam or gel, and can be customized to fit individual foot shapes and needs. Many people use insoles to alleviate foot pain or discomfort caused by conditions like plantar fasciitis or flat feet. They can also enhance the fit of shoes, making them more comfortable for daily activities or sports. Choosing the right insole can significantly improve your walking or running experience.